This book is the missing introduction to mainframe computing for IT leaders and professionals. Vendor-neutral guidance on mainframe strategy, costs, modernization, and cloud integration. Written by Niek de Greef, a mainframe strategist with three decades of experience translating technical complexity into clear strategic choices for IT leaders worldwide.

Don’t be afraid of the Mainframe – Available February 2026!

Don’t be afraid of the Mainframe book – The missing introduction for IT Leaders and Professionals

Don't Be Afraid of the Mainframe book cover by Niek de Greef

The new book Don’t Be Afraid of the Mainframe cuts through the noise with 30+ years of hands-on expertise. Whether you’re deciding the platform’s future or defending its present, this book gives you the information you need to make confident strategic decisions.

You’ll discover:

  • Why the mainframe processes 70% of global transactions, and why “legacy” doesn’t mean “obsolete”
  • The real economics: where costs hide, how licensing works, and what you can control
  • Modern capabilities you didn’t know existed: AI, containers, REST APIs, and cloud integration
  • Practical frameworks for assessing your platform, applications, and transformation options
  • Honest comparisons: when mainframe makes sense, when cloud is better, and how to integrate both

No sales pitch. No vendor bias. Just clear explanations, real-world case studies, and decision frameworks you can use immediately.

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